"""
    顺序队列 sequence_queue
    用数组实现的栈称之为顺序队列
"""


class SequenceQueue(object):
    """顺序队列"""
    def __init__(self):
        self.__items = list()

    def append(self, item):
        self.__items.append(item)

    def pop(self):
        self.__items.pop(0)

    @property
    def get_queue(self):
        return self.__items

    @property
    def is_empty(self):
        return self.__items == []
